\begin{tikzpicture} % 本图线段不成比例，仅供参考示意
    \tkzDefPoints{0/0/B, 0/2/A, 1.5/0/D, 1.5/0.5/C, 3.5/0/F, 3.5/0.5/E}
    \tkzInterLL(A,C)(B,D)  \tkzGetPoint{G}
    \tkzInterLL(A,E)(B,D)  \tkzGetPoint{H}
    \tkzInterLL(E,C)(A,B)  \tkzGetPoint{K}

    \tkzDrawSegments(A,B  C,D  E,F A,G  A,H B,H)
    \tkzDrawSegment[dashed](E,K)
    \tkzLabelPoints[above](A)
    \tkzLabelPoints[left](B,K)
    \tkzLabelPoints[below](D,G,F)
    \tkzLabelPoints[right](H)
    \tkzLabelPoints[above,xshift=.3em](C,E)
\end{tikzpicture}

